src/helper/replacements.h

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
   6  *   oyvind.harboe@zylin.com                                               *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Spencer Oliver                                  *
   9  *   spen@spen-soft.co.uk                                                  *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifndef REPLACEMENTS_H
  27 #define REPLACEMENTS_H
  28
  29 #include "types.h"
  30 #include "system.h"
  31
  32 /* MIN,MAX macros */
  33 #ifndef MIN
  34 #define MIN(a,b) (((a)<(b))?(a):(b))
  35 #endif
  36 #ifndef MAX
  37 #define MAX(a,b) (((a)>(b))?(a):(b))
  38 #endif
  39
  40 /* for systems that do not support ENOTSUP
  41  * win32 being one of them */
  42 #ifndef ENOTSUP
  43 #define ENOTSUP 134             /* Not supported */
  44 #endif
  45
  46 #ifndef HAVE_SYS_TIME_H
  47
  48 #ifndef _TIMEVAL_DEFINED
  49 #define _TIMEVAL_DEFINED
  50
  51 struct timeval {
  52         long tv_sec;
  53         long tv_usec;
  54 };
  55
  56 #endif /* _TIMEVAL_DEFINED */
  57
  58 #endif
  59
  60 /* gettimeofday() */
  61 #ifndef HAVE_GETTIMEOFDAY
  62
  63 #ifdef _WIN32
  64 struct timezone {
  65         int tz_minuteswest;
  66         int tz_dsttime;
  67 };
  68 #endif
  69 struct timezone;
  70
  71 extern int gettimeofday(struct timeval *tv, struct timezone *tz);
  72 #endif
  73
  74 #ifndef IN_REPLACEMENTS_C
  75 /**** clear_malloc & fill_malloc ****/
  76 void *clear_malloc(size_t size);
  77 void *fill_malloc(size_t size);
  78 #endif
  79
  80 /*
  81  * Now you have 3 ways for the malloc function:
  82  *
  83  * 1. Do not change anything, use the original malloc
  84  *
  85  * 2. Use the clear_malloc function instead of the original malloc.
  86  *    In this case you must use the following define:
  87  *    #define malloc((_a)) clear_malloc((_a))
  88  *
  89  * 3. Use the fill_malloc function instead of the original malloc.
  90  *    In this case you must use the following define:
  91  *    #define malloc((_a)) fill_malloc((_a))
  92  *
  93  * We have figured out that there could exist some malloc problems
  94  * where variables are using without to be initialise. To find this
  95  * places, use the fill_malloc function. With this function we want
  96  * to initialize memory to some known bad state. This is quite easily
  97  * spotted in the debugger and will trap to an invalid address.
  98  *
  99  * clear_malloc can be used if you want to set not initialise
 100  * variable to 0.
 101  *
 102  * If you do not want to change the malloc function, to not use one of
 103  * the following macros. Which is the default way.
 104  */
 105
 106 /* #define malloc(_a) clear_malloc(_a) */
 107 /* #define malloc(_a) fill_malloc(_a) */
 108
 109 /* GNU extensions to the C library that may be missing on some systems */
 110 #ifndef HAVE_STRNDUP
 111 extern char* strndup(const char *s, size_t n);
 112 #endif /* HAVE_STRNDUP */
 113
 114 #ifndef HAVE_STRNLEN
 115 extern size_t strnlen(const char *s, size_t maxlen);
 116 #endif /* HAVE_STRNLEN */
 117
 118 #ifndef HAVE_USLEEP
 119 #ifdef _WIN32
 120 static __inline unsigned usleep(unsigned int usecs)
 121 {
 122         Sleep((usecs/1000));
 123         return 0;
 124 }
 125 #else
 126 #if BUILD_ECOSBOARD
 127 void usleep(int us);
 128 #else
 129 #error no usleep defined for your platform
 130 #endif
 131 #endif
 132 #endif /* HAVE_USLEEP */
 133
 134 /* Windows specific */
 135 #ifdef _WIN32
 136
 137 #define WIN32_LEAN_AND_MEAN
 138 #include <windows.h>
 139 #include <time.h>
 140
 141 /* win32 systems do not support ETIMEDOUT */
 142
 143 #ifndef ETIMEDOUT
 144 #define ETIMEDOUT WSAETIMEDOUT
 145 #endif
 146
 147 #if IS_MINGW == 1
 148 static __inline unsigned char inb(unsigned short int port)
 149 {
 150         unsigned char _v;
 151         __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (port));
 152         return _v;
 153 }
 154
 155 static __inline void outb(unsigned char value, unsigned short int port)
 156 {
 157         __asm__ __volatile__ ("outb %b0,%w1": :"a" (value), "Nd" (port));
 158 }
 159
 160 #endif /* IS_MINGW */
 161
 162 int win_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv);
 163
 164 #endif  /* _WIN32 */
 165
 166 /* generic socket functions for Windows and Posix */
 167 static __inline int write_socket( int handle, const void *buffer, unsigned int count )
 168 {
 169 #ifdef _WIN32
 170         return send(handle, buffer, count, 0);
 171 #else
 172         return write(handle, buffer, count);
 173 #endif
 174 }
 175
 176 static __inline int read_socket( int handle, void *buffer, unsigned int count )
 177 {
 178 #ifdef _WIN32
 179         return recv(handle, buffer, count, 0);
 180 #else
 181         return read(handle, buffer, count);
 182 #endif
 183 }
 184
 185 static __inline int close_socket(int sock)
 186 {
 187 #ifdef _WIN32
 188         return closesocket(sock);
 189 #else
 190         return close(sock);
 191 #endif
 192 }
 193
 194 static __inline void socket_nonblock(int fd)
 195 {
 196 #ifdef _WIN32
 197         unsigned long nonblock = 1;
 198         ioctlsocket(fd, FIONBIO, &nonblock );
 199 #else
 200         int oldopts = fcntl(fd, F_GETFL, 0);
 201         fcntl(fd, F_SETFL, oldopts | O_NONBLOCK);
 202 #endif
 203 }
 204
 205 static __inline int socket_select(int max_fd, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *tv)
 206 {
 207 #ifdef _WIN32
 208         return win_select(max_fd, rfds, wfds, efds, tv);
 209 #else
 210         return select(max_fd, rfds, wfds, efds, tv);
 211 #endif
 212 }
 213
 214 #ifndef HAVE_ELF_H
 215
 216 typedef struct
 217 {
 218         unsigned char   e_ident[16];    /* Magic number and other info */
 219         u16     e_type;                 /* Object file type */
 220         u16     e_machine;              /* Architecture */
 221         u32     e_version;              /* Object file version */
 222         u32 e_entry;            /* Entry point virtual address */
 223         u32 e_phoff;            /* Program header table file offset */
 224         u32     e_shoff;                /* Section header table file offset */
 225         u32     e_flags;                /* Processor-specific flags */
 226         u16     e_ehsize;               /* ELF header size in bytes */
 227         u16     e_phentsize;    /* Program header table entry size */
 228         u16     e_phnum;                /* Program header table entry count */
 229         u16     e_shentsize;    /* Section header table entry size */
 230         u16     e_shnum;                /* Section header table entry count */
 231         u16     e_shstrndx;             /* Section header string table index */
 232 } Elf32_Ehdr;
 233
 234 #define ELFMAG          "\177ELF"
 235 #define SELFMAG         4
 236
 237 #define EI_CLASS        4               /* File class byte index */
 238 #define ELFCLASS32      1               /* 32-bit objects */
 239 #define ELFCLASS64      2               /* 64-bit objects */
 240
 241 #define EI_DATA         5               /* Data encoding byte index */
 242 #define ELFDATA2LSB     1               /* 2's complement, little endian */
 243 #define ELFDATA2MSB     2               /* 2's complement, big endian */
 244
 245 typedef struct
 246 {
 247         u32 p_type;                     /* Segment type */
 248         u32 p_offset;           /* Segment file offset */
 249         u32 p_vaddr;            /* Segment virtual address */
 250         u32 p_paddr;            /* Segment physical address */
 251         u32 p_filesz;           /* Segment size in file */
 252         u32 p_memsz;            /* Segment size in memory */
 253         u32 p_flags;            /* Segment flags */
 254         u32 p_align;            /* Segment alignment */
 255 } Elf32_Phdr;
 256
 257 #define PT_LOAD         1               /* Loadable program segment */
 258
 259 #endif /* HAVE_ELF_H */
 260
 261 #endif /* REPLACEMENTS_H */